...but the ones I have used including eXtremeFax and RingCentral WILL allow you to fax directly from AC.
Ron, you have to read the posts. Yes, you can easily fax directly from AC using Internet Fax. Most have you use a print driver and that is always an option from anywhere in AC. But, how you can make a case that Internet Faxing with a monthly charge and a per page charge once over the limit, is cheaper than paying NOTHING for each regular fax is questionable.